The service engineer knows what he is doing. Checked with line tester and approached everything in a professional way. Felt the thermostat and controller is bit costly. Paid 1250 for the component. Service 250. Reasonable.

I feel it would have been better to contact manufacturers authorised service centre as parts of this stove were not available in open market.
Also, technician insists on cash.
Overall, UC app alone is useful. Rest of the process is just same as any other service centre.